(Examples, Cuttle-fish, Nautilus.)
CETACEA.--An order of Mammalia, including the Whales, Dolphins, etc.,
having the form of the body fish-like, the skin naked, and only the fore
limbs developed.
CHELONIA.--An order of Reptiles including the Turtles, Tortoises, etc.
CIRRIPEDES.--An order of Crustaceans including the Barnacles and Acorn-
shells. Their young resemble those of many other Crustaceans in form; but
when mature they are always attached to other objects, either directly or
by means of a stalk, and their bodies are enclosed by a calcareous shell
composed of several pieces, two of which can open to give issue to a bunch
of curled, jointed tentacles, which represent the limbs.
COCCUS.--The genus of Insects including the Cochineal. In these the male
is a minute, winged fly, and the female generally a motionless, berry-like
mass.
COCOON.--A case usually of silky material, in which insects are frequently
enveloped during the second or resting-stage (pupa) of their existence.
The term "cocoon-stage" is here used as equivalent to "pupa-stage."
COELOSPERMOUS.--A term applied to those fruits of the Umbelliferae which
have the seed hollowed on the inner face.
COLEOPTERA.--Beetles, an order of Insects, having a biting mouth and the
first pair of wings more or less horny, forming sheaths for the second
pair, and usually meeting in a straight line down the middle of the back.
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